/**
 * CLI helper functions
 *
 * Utility functions for option parsing and task classification.
 */

import type { Command } from 'commander';
import type { TaskExecutionOptions } from '../../features/tasks/index.js';
import type { ProviderType } from '../../infra/providers/index.js';
import { error } from '../../shared/ui/index.js';
import { isIssueReference } from '../../infra/github/index.js';

/**
 * Resolve --provider and --model options into TaskExecutionOptions.
 * Returns undefined if neither is specified.
 */
export function resolveAgentOverrides(program: Command): TaskExecutionOptions | undefined {
  const opts = program.opts();
  const provider = opts.provider as ProviderType | undefined;
  const model = opts.model as string | undefined;

  if (!provider && !model) {
    return undefined;
  }

  return { provider, model };
}

/**
 * Parse --create-worktree option value (yes/no/true/false).
 * Returns undefined if not specified, boolean otherwise.
 * Exits with error on invalid value.
 */
export function parseCreateWorktreeOption(value?: string): boolean | undefined {
  if (!value) {
    return undefined;
  }

  const normalized = value.toLowerCase();
  if (normalized === 'yes' || normalized === 'true') {
    return true;
  }
  if (normalized === 'no' || normalized === 'false') {
    return false;
  }

  error('Invalid value for --create-worktree. Use yes or no.');
  process.exit(1);
}

/**
 * Check if the input is a task description that should execute directly
 * vs one that should enter interactive mode.
 *
 * Direct execution (returns true):
 * - Valid issue references (e.g., "#32", "#10 #20")
 *
 * Interactive mode (returns false):
 * - All other inputs (task descriptions, single words, slash-prefixed, etc.)
 *
 * Note: This simplified logic ensures that only explicit issue references
 * trigger direct execution. All other inputs go through interactive mode
 * for requirement clarification.
 */
export function isDirectTask(input: string): boolean {
  return isIssueReference(input) || input.trim().split(/\s+/).every((t: string) => isIssueReference(t));
}